如图,已知△ABC内接于⊙O,AB为⊙O的直径,点D为⊙O上一点,
,E为CA延长线上一点.
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149632233472/2965937638957056/STEM/9d457a1e-72a2-4bf5-909e-1686f78e894c.png?resizew=204)
(1)连AD,求证:AD平分∠BAE;
(2)过点D作DF⊥AB于点F,求证:FA+AC=FB.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/153189bd21dcaf08403cc5a4c97acdef.png)
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149632233472/2965937638957056/STEM/9d457a1e-72a2-4bf5-909e-1686f78e894c.png?resizew=204)
(1)连AD,求证:AD平分∠BAE;
(2)过点D作DF⊥AB于点F,求证:FA+AC=FB.
更新时间:2022-04-25 19:58:29
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【知识点】 圆与三角形的综合(圆的综合问题)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,△ACE内接于⊙O,AB是⊙O的直径,弦CD⊥AB于点H,交AE于点F,过点E作EG∥AC,分别交CD、AB的延长线于点G、M.
(1)求证:△ECF∽△GCE;
(2)若tanG=
,AH=3
,求⊙O半径.
(1)求证:△ECF∽△GCE;
(2)若tanG=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2020/3/16/2420557803872256/2420940249677824/STEM/14bf10442ac449ea9a4275a114e727d6.png?resizew=199)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,在平面直角坐标系xOy中,点P(a,b)在第一象限.以P为圆心的圆经过原点,与y轴的另一个交点为A.点Q是线段OA上的点(不与O,A重合),过点Q作PQ的垂线交⊙P于点B(m,n),其中m≥0.
![](https://img.xkw.com/dksih/QBM/2015/12/4/1573939264208896/1573939270901760/STEM/be29c6be68f149deb938d2280be5d095.png?resizew=148)
(1)若b=5,则点A坐标是 ;
(2)在(1)的条件下,若OQ=8,求线段BQ的长;
(3)若点P在函数y=x2(x>0)的图象上,△BQP是等腰三角形且PQ=
,求出点B的坐标.
![](https://img.xkw.com/dksih/QBM/2015/12/4/1573939264208896/1573939270901760/STEM/be29c6be68f149deb938d2280be5d095.png?resizew=148)
(1)若b=5,则点A坐标是 ;
(2)在(1)的条件下,若OQ=8,求线段BQ的长;
(3)若点P在函数y=x2(x>0)的图象上,△BQP是等腰三角形且PQ=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
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